Playstation 3 will play HD DVDs. You do not need an accessory to have the HD DVD work.
No, it can't.
You can not
The Playstation does not play DVDs only CDs
No, PlayStation 3 is designed to play DVDs and Blu Ray movies.
The Playstation 3 plays both DVDs and Blu-Ray without a special adapter.
No, it only plays standard DVDs.
No PlayStation 2 and PlayStation 3 can play DVDs PlayStation 1 just will not be able to read the disc
PS2 games are on DVDs
Yes, it plays blu-ray and regular dvds.
Yes.
No the Playstation does not play DVDs, only the PS2 and PS3 can play DVDs
That's because that's all the PlayStation supported. it did not support DVDs.